Although there is no official policy on this, common sense dictates such scripts should only be used on DA servers. People have been very good about this, and we don't mind the odd customer using build scripts to setup their other (non-DA) servers.
If it becomes a problem, we will simply integrate the licensing database into the build scripts (like the setup.sh script) so it cannot be abused. In the meantime, thanks (so far) to everyone using it responsibly.
Mark